borderColor property
Customizes the border color of the trackball tooltip. To make border visible for plot band, need to set both the border color and border width.
Defaults to null
.
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: SfSparkAreaChart(
trackball: SparkChartTrackball(borderWidth: 2,
borderColor: Colors.black,),
data: <double>[18, 24, 30, 14, 28],
)),
);
}
Implementation
final Color? borderColor;